Title :

The contribution of body weight distribution and center of pressure location in the control of mediolateral stance.

Author(s) :

Bonnet, Cédrick T. [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Cherraf, Sarah [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Szaffarczyk, Sébastien [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Rougier, Patrice R [Auteur]

Journal title :

Journal of biomechanics

Abbreviated title :

J Biomech

Volume number :

47

Pages :

1603-8

Publication date :

2014-05-07

ISSN :

1873-2380

English keyword(s) :

Adult
Body Weight
Female
Humans
Male
Models
Biological
Posture
Pressure
Young Adult
Body weight distribution
Center of pressure location
Foot position
Methodology
Postural control

HAL domain(s) :

Sciences cognitives

English abstract : [en]

The study investigated the mediolateral control of upright stance in 16 healthy, young adults. The model analyzed the body weight distribution and center of pressure location mechanisms under three stance width conditions ...
Show more >The study investigated the mediolateral control of upright stance in 16 healthy, young adults. The model analyzed the body weight distribution and center of pressure location mechanisms under three stance width conditions (feet close, under standard condition, and apart). Our first objective was to discuss some methodological requirements to investigate the contribution of both mechanisms by means of two platforms. It is proposed that both the amplitude contribution (in variability analyses) and active contribution (in cross-correlation analyses) need to be studied distinctively. These analyses may be concerned with the strength and the degree of active contributions, respectively. Based on this theoretical proposition, we expected and found that the amplitude contribution of both mechanisms was higher and lower in wide and narrow stances compared with that in the standard stance, respectively. Indeed, the closer the two reaction forces, the lower their mechanical contribution. As expected, the active contribution of both mechanisms was significantly lower and higher in wide and narrow stances, respectively. Indeed, the further the feet apart, the less active both mechanisms needed to be to control mediolateral stance. Overall, only the center of pressure location mechanism really changed its significant contribution to control mediolateral stance under the three conditions. The result is important because this mechanism is known to be secondary, weaker than the body weight distribution mechanism to control mediolateral stance. In practical terms, these findings may explain why the mediolateral variability of center of pressure displacement was significantly higher in narrow stance but not lower in wide stance.Show less >

Language :

Anglais

Audience :

Non spécifiée

Collections :

• Autres travaux scientifiques

Submission date :

2019-06-05T18:09:44Z
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